Seismic and well data interpretation for Fort Abbas area in Punjab Platform, Pakistan

Abstract

This study is carried out to mark the structural trends of subsurface by using seismic reflection data. Present study involves seismic interpretation, preparation of Time and Depth contour maps, 3D time surfaces and Isopach map with help of reflection seismic data. This study suggests presence of Paleo-high of post Jurassic age. Paleocene and younger formations are unaffected by this tectonic event. Subsurface seismic and well data represents Basement, Salt Range, Jutana/Kussak, Tobra, Ranikot and Eocene rock units. A structural high is present in almost all seismic lines used. The general dip trend is due West and obvious on Time and Depth contour maps as well as on 3D surface. In northwest direction Cambrian sediments possess maximum thickness represented by Isopach maps. Triassic and Cretaceous formations are pinching towards southeast direction observed through well correlation. Drilling of Fort Abbas Well-01 was carried out to test the hydrocarbon potential of these rock units. It was declared dry due to improper seal within the Cambrian reservoir. On the basis of seismic data, it would not be false to say that the Cambrian succession is highly fractured and complex to interpret